Printer&#39;s quoin.



Nn. 66%,@72. Patented Feb. l2, 190|. E. L. WIL-SUN.

PRINTERS QUUIN.

(Application led Apr. 14, 1900.)

(No Model.)

"5 In @L l ul w [n1/e n or s: ESL. M2607@ pf A finely@ derart@ PattiniOrmea lD'WlN L. WILSON, OF MAYFAIR, lLLlNOlS.

WRINTERS QUOIN.

QVF-GXFIC ATIGN forming bart of @Letters Patent No. 668,072, datedFebruary 12, 1901.

Application filed April 14, 1900. Serial No. 12,881'. (No model.)

To f//ZZ wh/0171, t may concern:

lle it known that l, EDWIN L. VILSON, a citizen of the United States,residing at Mayfair, in the county of Cook and Stat-e of lllinois, haveinvented a new and useful Printers Quoin, of which the following is aspecification.

My invention relates to quoins, and more particularly to means forlocking the saine in position.

The object of the invention is to provide a lock which is simple inconstruction, efficient in operation, and will be exceedingly cheap; alock that can be attached to and form a permanent part of the quoin andbe so constructs ed that it can be used or not, as occasion demands; alock which can be applied to quoins similar to those now in general use,thereby requiring no change in the equipment of the office; a lockwhich, afxed to both quoins, works in such a manner that any two quoinswill make a pair, thus making a great saving in time and expense by notrequiring that they be sorted or paired off, and a lock so constructetflthat when in operation the motion of the press cannot. jar it. out ofposition.

With these objects in view my invention consists in the improvedconstruction and ar rangement of parts of a quoin and lock, as will behereinafter more particularlyset forth.

ln the accompanying drawings, in which the same referencenumeralsindicate corresponding parts in each of the views in which they occur,Figure l is a perspective View of my improved quoin and lock. Fig. 2 isan end view of a slight modification. Fig. 3 is a plan View. Fig. it isa longitudinal sectional view of two of the quoins in position.

ln operating printing-presses, and especially those in which the papermust be run through the press more than once, asin multiple-coloredprinting, it is necessary that the forms be held absolutely rigid duringthe entire operation to cause the different colors to register with eachother perfectly. Unless means be taken to lock the quoins used forretaining the forms in position there is danger of the jar of themachine loosening the quoins and permitting the form to shift to agreater or less extent, thereby th rowing the impressions outof registerand causing a great loss of time and material. lo avoid this difficulty,means have been resorted to for locking the quoins which have been moreor less complicated and costly, and therefore have not come into generaluse. To obviate these difficulties, l provide the ordinary wedgeshapedquoiu l with a lock 2, which may be seated in the larger end of thequoin and be located wholly within the boundary of said quoin, andtherefore it does not change the form of the quoin in any manner. Iprefer to form the lock substantially circular, as shown in thedrawings, and secure it rotativelywithin a circular recess 3 by means ofa screw et or suitable retaining device. One portion of the lock isprovided with a notch or recess 5, which registers with the usual slot Gin the quoin, and the diametrically opposite portion of the lock isprovided with a projection 7, which tits within a recess 8, said recessextending from the upper portion of the recess 3 to the back or outersurface of the quoin.

'lhe recess 5 is of substantially the same width as the slot 6, with itswalls lyingin the length of the quoin, and the recess 8 is of such aWidth that when the projection 7 is moved from one end ot' the recess 8to the other one or the otherof the edges of the slot will be movedpartially across the slot G in position to engage with one ot' the teeth10, formed upon the inner face of the quoin, in alinement with thelusual central rib 1l. If desired, the radial walls of the slot 5 may beslightly tapered, so that when the quoins are being moved longitudinallyrelatively to each other to lock the form in position if the lock shouldbe accidentally turned across the end of the slot 6 the engagement ofthe teeth l0 with the inclined surface will automatically force the lockback out of the way.

As above described, it will be seen that a quoin provided withmyimproved lock is substantially the same in exterior appearance as theordinary quoin and that any two of the quoins can be put togetherwithout the necessity of any particular arrangement, thus producing aquoin that is as simple and easily operated as the quoin in present use.After the quoins have been moved longitudinally of each other a suficient distance to lock the form in position the lock at either or bothends of the two quoins may be turned across TOO the end of the groove inthat quoin in position to engage With the teeth of the opposite end ofthe companion quoin. A slight reverse movement of the quoins by the keyWill cause one of the teeth to engage with the lock, and thereby preventthe lock from being shaken. or accidentally moved out of its position bythe jar of the machinery. The ease with Which the lock may be rotatedWithin its recess may be regulated or adjusted by tightening orloosening the screw used in securing it in its recess.

Ii" desired, the recess in the end of the qnoin may be substantiallyangular, as shown at l2, and the lock can be in the form of a plate 13,Which is pivotally secured at one end and has its opposite end providedwith a notch 14, which will register With the groove in the qnoin whenthe plate stands in one position, but Which will be out of registertherewith When the plate is moved to either side. Other changes ormodifications may be resorted to Without departing from the spirit of myinvention.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent of the United States, is'- l. Thecombination with a substantially Wedge-shaped quoin provided with agroove and a series of teeth, of a laterally-movable recessed lockpivotally secured to the larger end in position to be moved across themouth of the groove, substantially as described.

2. The combination with a substantially `Wedge-shaped quoin providedwith a groove and a recess at its larger end, of a laterallymovable lockseated Within said recessin position to be moved transversely across themouth of said groove, substantially as described.

3. The combination with a .recessed'quoim of a notched lock locatedWithin said recess, said lock being movable transversely of the quoinand the Walls of the notch being in line with the length thereofsubstantially as described.

4:. The combination with a quoin having a circular recess at one end, ofa circular lock pi votally secured Within said recess, one portion ofthe lock being notched and another portion being provided with means forrotating the lock, substantially as described.

5. The combination with a quoin provided with a groove and a series ofteeth in alinement therewith, of a lock pivotally secured at one end ofthe quoin and provided with a notch to register with said groove, theWalls of the lock being inclined, substantially as described.

6. The combination with a substantially Wedge-shaped quoin provided witha rib and a groove, the head ot' which is provided with a circularrecess and a flaring recess extending therefrom to the back of thequoin, and the point is provided with a series of teeth in alinementwith the rib of the quoin, of a circular lock pivotally secured Withinsaid recess, one portion of which is notched to register with the grooveof the quoin and the opposite portion is provided With a projection toit within the flaring recess, substantially as described.

EDWIN L. WILSON. Witnesses:

ALBERT H. DREW, WILLIAM J oHNs.

